[texhax] Why am I getting Half a Circle?

[Robert Sherry]

     I am trying to use PSTricks to draw graphs and trees. However, it does
not seem to be working. Please consider the following LaTeX file:

       \documentclass[a4paper,11pt]{article}
       \usepackage{pst-node}
       % define the title
       \title{Drawing~a~Graph}
       \author{Robert~J.~Sherry}
       \begin{document}
       \maketitle
       \[\begin{pspicture}(0,-.5)(2,2)
       \rput(0,0) { \circlenode{t1}{$x$}}
       \rput(1,0) { \circlenode{t2}{$2$}}
       \rput(2,0) { \circlenode{t3}{$3$}}
       \rput(3,0) { \circlenode{t4}{$4$}}
       \rput(4.0,0) { \circlenode{t5}{$5$}}
       \end{pspicture} \]
       More text.
       \end{document}

When I run this through LaTeX and view the generated output file the circles
drawn are not complete. The middle three appear as two arcs. Could somebody
please tell me what I am doing wrong?

I thank the group in advance for their responses.

                                          Robert Sherry